I"m running fedora 13 in virtual box and when I go to display settings, it is set to 61 hertz and 800x600 screen resolution. It won't give me any other options other than making the resolution 640x480. I can't change the refresh rate either its stuck at 61 hertz. Any idea what I can do to change the resolution

In virtualbox you have a number of machine settings. One is for the virtual video adapter (Display settings). You need to increase the memory to the max (128MB), and for Linux clients enable 3d acceleration (2d is for Windows operating systems). Doing this I can use a 1920x1200 HD display with full color.

commented: Thanks for the help. Quick and clean +1

you must install :

virtualbox-guest-additions-iso
virtualbox-guest-dkms 
virtualbox-guest-source
virtualbox-guest-utils  
virtualbox-guest-x11
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